Answer:
 
 gallon.
 gallon.
Explanation:
Amount of orange juice Tony had is 
 gallons.
 gallons.
Amount of orange juice drank by him is 
 of the orange juice he had.
 of the orange juice he had.
To find the amount of orange juice Tony drink, we need to first convert the amount of orange juice Tony had in improper fraction, as the amount of juice he had is given in Mixed fraction.
So, amount of orange juice Tony had is 
 gallons.
 gallons.
Now, to find the amount of orange juice Tony drink, we need to multiply 
 and
 and 

So, amount of juice Tony drink is 


Hence, amount of orange juice Tony drink is 
 gallon.
 gallon.